1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains the login functions used by the iSCSI Target driver. 3e48354ceSNicholas Bellinger * 44c76251eSNicholas Bellinger * (c) Copyright 2007-2013 Datera, Inc. 5e48354ceSNicholas Bellinger * 6e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 7e48354ceSNicholas Bellinger * 8e48354ceSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 9e48354ceSNicholas Bellinger * it under the terms of the GNU General Public License as published by 10e48354ceSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 11e48354ceSNicholas Bellinger * (at your option) any later version. 12e48354ceSNicholas Bellinger * 13e48354ceSNicholas Bellinger * This program is distributed in the hope that it will be useful, 14e48354ceSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 15e48354ceSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16e48354ceSNicholas Bellinger * GNU General Public License for more details. 17e48354ceSNicholas Bellinger ******************************************************************************/ 18e48354ceSNicholas Bellinger 19e48354ceSNicholas Bellinger #include <linux/string.h> 20e48354ceSNicholas Bellinger #include <linux/kthread.h> 21e48354ceSNicholas Bellinger #include <linux/crypto.h> 2240401530SAl Viro #include <linux/idr.h> 23e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 24e48354ceSNicholas Bellinger #include <target/target_core_base.h> 25c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 26e48354ceSNicholas Bellinger 27e48354ceSNicholas Bellinger #include "iscsi_target_core.h" 28e48354ceSNicholas Bellinger #include "iscsi_target_tq.h" 29e48354ceSNicholas Bellinger #include "iscsi_target_device.h" 30e48354ceSNicholas Bellinger #include "iscsi_target_nego.h" 31e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 32e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 33e48354ceSNicholas Bellinger #include "iscsi_target_login.h" 34e48354ceSNicholas Bellinger #include "iscsi_target_stat.h" 35e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 37e48354ceSNicholas Bellinger #include "iscsi_target.h" 38e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 39e48354ceSNicholas Bellinger 40baa4d64bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 41baa4d64bSNicholas Bellinger 42baa4d64bSNicholas Bellinger static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn) 43e48354ceSNicholas Bellinger { 44baa4d64bSNicholas Bellinger struct iscsi_login *login; 45baa4d64bSNicholas Bellinger 46baa4d64bSNicholas Bellinger login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL); 47baa4d64bSNicholas Bellinger if (!login) { 48baa4d64bSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_login.\n"); 49baa4d64bSNicholas Bellinger return NULL; 50baa4d64bSNicholas Bellinger } 51a91eb7d9SNicholas Bellinger conn->login = login; 52baa4d64bSNicholas Bellinger login->conn = conn; 53baa4d64bSNicholas Bellinger login->first_request = 1; 54baa4d64bSNicholas Bellinger 55baa4d64bSNicholas Bellinger login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); 56baa4d64bSNicholas Bellinger if (!login->req_buf) { 57baa4d64bSNicholas Bellinger pr_err("Unable to allocate memory for response buffer.\n"); 58baa4d64bSNicholas Bellinger goto out_login; 59baa4d64bSNicholas Bellinger } 60baa4d64bSNicholas Bellinger 61baa4d64bSNicholas Bellinger login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); 62baa4d64bSNicholas Bellinger if (!login->rsp_buf) { 63baa4d64bSNicholas Bellinger pr_err("Unable to allocate memory for request buffer.\n"); 64baa4d64bSNicholas Bellinger goto out_req_buf; 65baa4d64bSNicholas Bellinger } 66baa4d64bSNicholas Bellinger 67baa4d64bSNicholas Bellinger conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL); 68baa4d64bSNicholas Bellinger if (!conn->conn_ops) { 69baa4d64bSNicholas Bellinger pr_err("Unable to allocate memory for" 70baa4d64bSNicholas Bellinger " struct iscsi_conn_ops.\n"); 71baa4d64bSNicholas Bellinger goto out_rsp_buf; 72baa4d64bSNicholas Bellinger } 73baa4d64bSNicholas Bellinger 74d5627acbSRoland Dreier init_waitqueue_head(&conn->queues_wq); 75e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->conn_list); 76e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->conn_cmd_list); 77e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->immed_queue_list); 78e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->response_queue_list); 79e48354ceSNicholas Bellinger init_completion(&conn->conn_post_wait_comp); 80e48354ceSNicholas Bellinger init_completion(&conn->conn_wait_comp); 81e48354ceSNicholas Bellinger init_completion(&conn->conn_wait_rcfr_comp); 82e48354ceSNicholas Bellinger init_completion(&conn->conn_waiting_on_uc_comp); 83e48354ceSNicholas Bellinger init_completion(&conn->conn_logout_comp); 84e48354ceSNicholas Bellinger init_completion(&conn->rx_half_close_comp); 85e48354ceSNicholas Bellinger init_completion(&conn->tx_half_close_comp); 86e48354ceSNicholas Bellinger spin_lock_init(&conn->cmd_lock); 87e48354ceSNicholas Bellinger spin_lock_init(&conn->conn_usage_lock); 88e48354ceSNicholas Bellinger spin_lock_init(&conn->immed_queue_lock); 89e48354ceSNicholas Bellinger spin_lock_init(&conn->nopin_timer_lock); 90e48354ceSNicholas Bellinger spin_lock_init(&conn->response_queue_lock); 91e48354ceSNicholas Bellinger spin_lock_init(&conn->state_lock); 92e48354ceSNicholas Bellinger 93e48354ceSNicholas Bellinger if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) { 94e48354ceSNicholas Bellinger pr_err("Unable to allocate conn->conn_cpumask\n"); 95baa4d64bSNicholas Bellinger goto out_conn_ops; 96e48354ceSNicholas Bellinger } 97baa4d64bSNicholas Bellinger conn->conn_login = login; 98e48354ceSNicholas Bellinger 99baa4d64bSNicholas Bellinger return login; 100baa4d64bSNicholas Bellinger 101baa4d64bSNicholas Bellinger out_conn_ops: 102baa4d64bSNicholas Bellinger kfree(conn->conn_ops); 103baa4d64bSNicholas Bellinger out_rsp_buf: 104baa4d64bSNicholas Bellinger kfree(login->rsp_buf); 105baa4d64bSNicholas Bellinger out_req_buf: 106baa4d64bSNicholas Bellinger kfree(login->req_buf); 107baa4d64bSNicholas Bellinger out_login: 108baa4d64bSNicholas Bellinger kfree(login); 109baa4d64bSNicholas Bellinger return NULL; 110e48354ceSNicholas Bellinger } 111e48354ceSNicholas Bellinger 112e48354ceSNicholas Bellinger /* 113e48354ceSNicholas Bellinger * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup 114e48354ceSNicholas Bellinger * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel 115e48354ceSNicholas Bellinger */ 116e48354ceSNicholas Bellinger int iscsi_login_setup_crypto(struct iscsi_conn *conn) 117e48354ceSNicholas Bellinger { 118e48354ceSNicholas Bellinger /* 119e48354ceSNicholas Bellinger * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts 120e48354ceSNicholas Bellinger * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback 121e48354ceSNicholas Bellinger * to software 1x8 byte slicing from crc32c.ko 122e48354ceSNicholas Bellinger */ 123e48354ceSNicholas Bellinger conn->conn_rx_hash.flags = 0; 124e48354ceSNicholas Bellinger conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0, 125e48354ceSNicholas Bellinger CRYPTO_ALG_ASYNC); 126e48354ceSNicholas Bellinger if (IS_ERR(conn->conn_rx_hash.tfm)) { 127e48354ceSNicholas Bellinger pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n"); 128e48354ceSNicholas Bellinger return -ENOMEM; 129e48354ceSNicholas Bellinger } 130e48354ceSNicholas Bellinger 131e48354ceSNicholas Bellinger conn->conn_tx_hash.flags = 0; 132e48354ceSNicholas Bellinger conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0, 133e48354ceSNicholas Bellinger CRYPTO_ALG_ASYNC); 134e48354ceSNicholas Bellinger if (IS_ERR(conn->conn_tx_hash.tfm)) { 135e48354ceSNicholas Bellinger pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n"); 136e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_rx_hash.tfm); 137e48354ceSNicholas Bellinger return -ENOMEM; 138e48354ceSNicholas Bellinger } 139e48354ceSNicholas Bellinger 140e48354ceSNicholas Bellinger return 0; 141e48354ceSNicholas Bellinger } 142e48354ceSNicholas Bellinger 143e48354ceSNicholas Bellinger static int iscsi_login_check_initiator_version( 144e48354ceSNicholas Bellinger struct iscsi_conn *conn, 145e48354ceSNicholas Bellinger u8 version_max, 146e48354ceSNicholas Bellinger u8 version_min) 147e48354ceSNicholas Bellinger { 148e48354ceSNicholas Bellinger if ((version_max != 0x00) || (version_min != 0x00)) { 149e48354ceSNicholas Bellinger pr_err("Unsupported iSCSI IETF Pre-RFC Revision," 150e48354ceSNicholas Bellinger " version Min/Max 0x%02x/0x%02x, rejecting login.\n", 151e48354ceSNicholas Bellinger version_min, version_max); 152e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 153e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_VERSION); 154e48354ceSNicholas Bellinger return -1; 155e48354ceSNicholas Bellinger } 156e48354ceSNicholas Bellinger 157e48354ceSNicholas Bellinger return 0; 158e48354ceSNicholas Bellinger } 159e48354ceSNicholas Bellinger 160e48354ceSNicholas Bellinger int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn) 161e48354ceSNicholas Bellinger { 162e48354ceSNicholas Bellinger int sessiontype; 163e48354ceSNicholas Bellinger struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL; 164e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->tpg; 165e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL, *sess_p = NULL; 166e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 167e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 168e48354ceSNicholas Bellinger 169e48354ceSNicholas Bellinger initiatorname_param = iscsi_find_param_from_key( 170e48354ceSNicholas Bellinger INITIATORNAME, conn->param_list); 171e48354ceSNicholas Bellinger sessiontype_param = iscsi_find_param_from_key( 172e48354ceSNicholas Bellinger SESSIONTYPE, conn->param_list); 1731c5c12c6SRoland Dreier if (!initiatorname_param || !sessiontype_param) { 1741c5c12c6SRoland Dreier iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1751c5c12c6SRoland Dreier ISCSI_LOGIN_STATUS_MISSING_FIELDS); 176e48354ceSNicholas Bellinger return -1; 1771c5c12c6SRoland Dreier } 178e48354ceSNicholas Bellinger 179e48354ceSNicholas Bellinger sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0; 180e48354ceSNicholas Bellinger 181e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 182e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 183e48354ceSNicholas Bellinger sess_list) { 184e48354ceSNicholas Bellinger 1858359cf43SJörn Engel sess_p = se_sess->fabric_sess_ptr; 186e48354ceSNicholas Bellinger spin_lock(&sess_p->conn_lock); 187e48354ceSNicholas Bellinger if (atomic_read(&sess_p->session_fall_back_to_erl0) || 188e48354ceSNicholas Bellinger atomic_read(&sess_p->session_logout) || 189e48354ceSNicholas Bellinger (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { 190e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 191e48354ceSNicholas Bellinger continue; 192e48354ceSNicholas Bellinger } 1938359cf43SJörn Engel if (!memcmp(sess_p->isid, conn->sess->isid, 6) && 1948359cf43SJörn Engel (!strcmp(sess_p->sess_ops->InitiatorName, 1958359cf43SJörn Engel initiatorname_param->value) && 196e48354ceSNicholas Bellinger (sess_p->sess_ops->SessionType == sessiontype))) { 197e48354ceSNicholas Bellinger atomic_set(&sess_p->session_reinstatement, 1); 198e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 199e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess_p); 200e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess_p); 201e48354ceSNicholas Bellinger sess = sess_p; 202e48354ceSNicholas Bellinger break; 203e48354ceSNicholas Bellinger } 204e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 205e48354ceSNicholas Bellinger } 206e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 207e48354ceSNicholas Bellinger /* 208e48354ceSNicholas Bellinger * If the Time2Retain handler has expired, the session is already gone. 209e48354ceSNicholas Bellinger */ 210e48354ceSNicholas Bellinger if (!sess) 211e48354ceSNicholas Bellinger return 0; 212e48354ceSNicholas Bellinger 213e48354ceSNicholas Bellinger pr_debug("%s iSCSI Session SID %u is still active for %s," 214e48354ceSNicholas Bellinger " preforming session reinstatement.\n", (sessiontype) ? 215e48354ceSNicholas Bellinger "Discovery" : "Normal", sess->sid, 216e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 217e48354ceSNicholas Bellinger 218e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 219e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) { 220e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 221e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 22299367f01SNicholas Bellinger target_put_session(sess->se_sess); 22399367f01SNicholas Bellinger return 0; 224e48354ceSNicholas Bellinger } 225e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 226e48354ceSNicholas Bellinger 227e48354ceSNicholas Bellinger iscsit_stop_session(sess, 1, 1); 228e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 229e48354ceSNicholas Bellinger 23099367f01SNicholas Bellinger target_put_session(sess->se_sess); 23199367f01SNicholas Bellinger return 0; 232e48354ceSNicholas Bellinger } 233e48354ceSNicholas Bellinger 234e48354ceSNicholas Bellinger static void iscsi_login_set_conn_values( 235e48354ceSNicholas Bellinger struct iscsi_session *sess, 236e48354ceSNicholas Bellinger struct iscsi_conn *conn, 23750e5c87dSChristoph Hellwig __be16 cid) 238e48354ceSNicholas Bellinger { 239e48354ceSNicholas Bellinger conn->sess = sess; 24050e5c87dSChristoph Hellwig conn->cid = be16_to_cpu(cid); 241e48354ceSNicholas Bellinger /* 242e48354ceSNicholas Bellinger * Generate a random Status sequence number (statsn) for the new 243e48354ceSNicholas Bellinger * iSCSI connection. 244e48354ceSNicholas Bellinger */ 245e48354ceSNicholas Bellinger get_random_bytes(&conn->stat_sn, sizeof(u32)); 246e48354ceSNicholas Bellinger 247e48354ceSNicholas Bellinger mutex_lock(&auth_id_lock); 248e48354ceSNicholas Bellinger conn->auth_id = iscsit_global->auth_id++; 249e48354ceSNicholas Bellinger mutex_unlock(&auth_id_lock); 250e48354ceSNicholas Bellinger } 251e48354ceSNicholas Bellinger 25279d59d08SRoland Dreier static __printf(2, 3) int iscsi_change_param_sprintf( 25379d59d08SRoland Dreier struct iscsi_conn *conn, 25479d59d08SRoland Dreier const char *fmt, ...) 25579d59d08SRoland Dreier { 25679d59d08SRoland Dreier va_list args; 25779d59d08SRoland Dreier unsigned char buf[64]; 25879d59d08SRoland Dreier 25979d59d08SRoland Dreier memset(buf, 0, sizeof buf); 26079d59d08SRoland Dreier 26179d59d08SRoland Dreier va_start(args, fmt); 26279d59d08SRoland Dreier vsnprintf(buf, sizeof buf, fmt, args); 26379d59d08SRoland Dreier va_end(args); 26479d59d08SRoland Dreier 26579d59d08SRoland Dreier if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { 26679d59d08SRoland Dreier iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 26779d59d08SRoland Dreier ISCSI_LOGIN_STATUS_NO_RESOURCES); 26879d59d08SRoland Dreier return -1; 26979d59d08SRoland Dreier } 27079d59d08SRoland Dreier 27179d59d08SRoland Dreier return 0; 27279d59d08SRoland Dreier } 27379d59d08SRoland Dreier 274e48354ceSNicholas Bellinger /* 275e48354ceSNicholas Bellinger * This is the leading connection of a new session, 276e48354ceSNicholas Bellinger * or session reinstatement. 277e48354ceSNicholas Bellinger */ 278e48354ceSNicholas Bellinger static int iscsi_login_zero_tsih_s1( 279e48354ceSNicholas Bellinger struct iscsi_conn *conn, 280e48354ceSNicholas Bellinger unsigned char *buf) 281e48354ceSNicholas Bellinger { 282e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL; 283e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 284e70beee7SNicholas Bellinger enum target_prot_op sup_pro_ops; 28513b5533aSBenjamin Wang int ret; 286e48354ceSNicholas Bellinger 287e48354ceSNicholas Bellinger sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); 288e48354ceSNicholas Bellinger if (!sess) { 289e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 290e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 291e48354ceSNicholas Bellinger pr_err("Could not allocate memory for session\n"); 2920957627aSNicholas Bellinger return -ENOMEM; 293e48354ceSNicholas Bellinger } 294e48354ceSNicholas Bellinger 295e48354ceSNicholas Bellinger iscsi_login_set_conn_values(sess, conn, pdu->cid); 296e48354ceSNicholas Bellinger sess->init_task_tag = pdu->itt; 2978359cf43SJörn Engel memcpy(&sess->isid, pdu->isid, 6); 29850e5c87dSChristoph Hellwig sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn); 299e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->sess_conn_list); 300e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); 301e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->cr_active_list); 302e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->cr_inactive_list); 303e48354ceSNicholas Bellinger init_completion(&sess->async_msg_comp); 304e48354ceSNicholas Bellinger init_completion(&sess->reinstatement_comp); 305e48354ceSNicholas Bellinger init_completion(&sess->session_wait_comp); 306e48354ceSNicholas Bellinger init_completion(&sess->session_waiting_on_uc_comp); 307e48354ceSNicholas Bellinger mutex_init(&sess->cmdsn_mutex); 308e48354ceSNicholas Bellinger spin_lock_init(&sess->conn_lock); 309e48354ceSNicholas Bellinger spin_lock_init(&sess->cr_a_lock); 310e48354ceSNicholas Bellinger spin_lock_init(&sess->cr_i_lock); 311e48354ceSNicholas Bellinger spin_lock_init(&sess->session_usage_lock); 312e48354ceSNicholas Bellinger spin_lock_init(&sess->ttt_lock); 313e48354ceSNicholas Bellinger 314c9365bd0STejun Heo idr_preload(GFP_KERNEL); 315998866b0SRoland Dreier spin_lock_bh(&sess_idr_lock); 316c9365bd0STejun Heo ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT); 317c9365bd0STejun Heo if (ret >= 0) 318c9365bd0STejun Heo sess->session_index = ret; 319998866b0SRoland Dreier spin_unlock_bh(&sess_idr_lock); 320c9365bd0STejun Heo idr_preload_end(); 321e48354ceSNicholas Bellinger 32213b5533aSBenjamin Wang if (ret < 0) { 323c9365bd0STejun Heo pr_err("idr_alloc() for sess_idr failed\n"); 32413b5533aSBenjamin Wang iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 32513b5533aSBenjamin Wang ISCSI_LOGIN_STATUS_NO_RESOURCES); 32613b5533aSBenjamin Wang kfree(sess); 32713b5533aSBenjamin Wang return -ENOMEM; 32813b5533aSBenjamin Wang } 32913b5533aSBenjamin Wang 330e48354ceSNicholas Bellinger sess->creation_time = get_jiffies_64(); 331e48354ceSNicholas Bellinger /* 332e48354ceSNicholas Bellinger * The FFP CmdSN window values will be allocated from the TPG's 333e48354ceSNicholas Bellinger * Initiator Node's ACL once the login has been successfully completed. 334e48354ceSNicholas Bellinger */ 33550e5c87dSChristoph Hellwig sess->max_cmd_sn = be32_to_cpu(pdu->cmdsn); 336e48354ceSNicholas Bellinger 337e48354ceSNicholas Bellinger sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); 338e48354ceSNicholas Bellinger if (!sess->sess_ops) { 339e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 340e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 341e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 342e48354ceSNicholas Bellinger " struct iscsi_sess_ops.\n"); 3430957627aSNicholas Bellinger kfree(sess); 3440957627aSNicholas Bellinger return -ENOMEM; 345e48354ceSNicholas Bellinger } 346e70beee7SNicholas Bellinger sup_pro_ops = conn->conn_transport->iscsit_get_sup_prot_ops(conn); 347e48354ceSNicholas Bellinger 348e70beee7SNicholas Bellinger sess->se_sess = transport_init_session(sup_pro_ops); 3490957627aSNicholas Bellinger if (IS_ERR(sess->se_sess)) { 350e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 351e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 3520957627aSNicholas Bellinger kfree(sess); 3530957627aSNicholas Bellinger return -ENOMEM; 354e48354ceSNicholas Bellinger } 355e48354ceSNicholas Bellinger 356e48354ceSNicholas Bellinger return 0; 357e48354ceSNicholas Bellinger } 358e48354ceSNicholas Bellinger 359e48354ceSNicholas Bellinger static int iscsi_login_zero_tsih_s2( 360e48354ceSNicholas Bellinger struct iscsi_conn *conn) 361e48354ceSNicholas Bellinger { 362e48354ceSNicholas Bellinger struct iscsi_node_attrib *na; 363e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 36403aa2070SNicholas Bellinger bool iser = false; 365e48354ceSNicholas Bellinger 366e48354ceSNicholas Bellinger sess->tpg = conn->tpg; 367e48354ceSNicholas Bellinger 368e48354ceSNicholas Bellinger /* 369e48354ceSNicholas Bellinger * Assign a new TPG Session Handle. Note this is protected with 370e48354ceSNicholas Bellinger * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). 371e48354ceSNicholas Bellinger */ 37260bfcf8eSAndy Grover sess->tsih = ++sess->tpg->ntsih; 373e48354ceSNicholas Bellinger if (!sess->tsih) 37460bfcf8eSAndy Grover sess->tsih = ++sess->tpg->ntsih; 375e48354ceSNicholas Bellinger 376e48354ceSNicholas Bellinger /* 377e48354ceSNicholas Bellinger * Create the default params from user defined values.. 378e48354ceSNicholas Bellinger */ 379e48354ceSNicholas Bellinger if (iscsi_copy_param_list(&conn->param_list, 38060bfcf8eSAndy Grover conn->tpg->param_list, 1) < 0) { 381e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 382e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 383e48354ceSNicholas Bellinger return -1; 384e48354ceSNicholas Bellinger } 385e48354ceSNicholas Bellinger 38603aa2070SNicholas Bellinger if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) 38703aa2070SNicholas Bellinger iser = true; 38803aa2070SNicholas Bellinger 38903aa2070SNicholas Bellinger iscsi_set_keys_to_negotiate(conn->param_list, iser); 390e48354ceSNicholas Bellinger 391e48354ceSNicholas Bellinger if (sess->sess_ops->SessionType) 392e48354ceSNicholas Bellinger return iscsi_set_keys_irrelevant_for_discovery( 393e48354ceSNicholas Bellinger conn->param_list); 394e48354ceSNicholas Bellinger 395e48354ceSNicholas Bellinger na = iscsit_tpg_get_node_attrib(sess); 396e48354ceSNicholas Bellinger 397e48354ceSNicholas Bellinger /* 398e48354ceSNicholas Bellinger * Need to send TargetPortalGroupTag back in first login response 399e48354ceSNicholas Bellinger * on any iSCSI connection where the Initiator provides TargetName. 400e48354ceSNicholas Bellinger * See 5.3.1. Login Phase Start 401e48354ceSNicholas Bellinger * 402e48354ceSNicholas Bellinger * In our case, we have already located the struct iscsi_tiqn at this point. 403e48354ceSNicholas Bellinger */ 40479d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) 405e48354ceSNicholas Bellinger return -1; 406e48354ceSNicholas Bellinger 407e48354ceSNicholas Bellinger /* 408e48354ceSNicholas Bellinger * Workaround for Initiators that have broken connection recovery logic. 409e48354ceSNicholas Bellinger * 410e48354ceSNicholas Bellinger * "We would really like to get rid of this." Linux-iSCSI.org team 411e48354ceSNicholas Bellinger */ 41279d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl)) 413e48354ceSNicholas Bellinger return -1; 414e48354ceSNicholas Bellinger 415e48354ceSNicholas Bellinger if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0) 416e48354ceSNicholas Bellinger return -1; 41703aa2070SNicholas Bellinger /* 41803aa2070SNicholas Bellinger * Set RDMAExtensions=Yes by default for iSER enabled network portals 41903aa2070SNicholas Bellinger */ 42003aa2070SNicholas Bellinger if (iser) { 42103aa2070SNicholas Bellinger struct iscsi_param *param; 42203aa2070SNicholas Bellinger unsigned long mrdsl, off; 42303aa2070SNicholas Bellinger int rc; 42403aa2070SNicholas Bellinger 42579d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes")) 42603aa2070SNicholas Bellinger return -1; 42779d59d08SRoland Dreier 42803aa2070SNicholas Bellinger /* 42903aa2070SNicholas Bellinger * Make MaxRecvDataSegmentLength PAGE_SIZE aligned for 43003aa2070SNicholas Bellinger * Immediate Data + Unsolicitied Data-OUT if necessary.. 43103aa2070SNicholas Bellinger */ 43203aa2070SNicholas Bellinger param = iscsi_find_param_from_key("MaxRecvDataSegmentLength", 43303aa2070SNicholas Bellinger conn->param_list); 43403aa2070SNicholas Bellinger if (!param) { 43503aa2070SNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 43603aa2070SNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 43703aa2070SNicholas Bellinger return -1; 43803aa2070SNicholas Bellinger } 43957103d7fSJingoo Han rc = kstrtoul(param->value, 0, &mrdsl); 44003aa2070SNicholas Bellinger if (rc < 0) { 44103aa2070SNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 44203aa2070SNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 44303aa2070SNicholas Bellinger return -1; 44403aa2070SNicholas Bellinger } 44503aa2070SNicholas Bellinger off = mrdsl % PAGE_SIZE; 44603aa2070SNicholas Bellinger if (!off) 44752d0aa79SNicholas Bellinger goto check_prot; 44803aa2070SNicholas Bellinger 44903aa2070SNicholas Bellinger if (mrdsl < PAGE_SIZE) 45003aa2070SNicholas Bellinger mrdsl = PAGE_SIZE; 45103aa2070SNicholas Bellinger else 45203aa2070SNicholas Bellinger mrdsl -= off; 45303aa2070SNicholas Bellinger 45403aa2070SNicholas Bellinger pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down" 45503aa2070SNicholas Bellinger " to PAGE_SIZE\n", mrdsl); 45603aa2070SNicholas Bellinger 45779d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl)) 45803aa2070SNicholas Bellinger return -1; 45952d0aa79SNicholas Bellinger /* 46052d0aa79SNicholas Bellinger * ISER currently requires that ImmediateData + Unsolicited 46152d0aa79SNicholas Bellinger * Data be disabled when protection / signature MRs are enabled. 46252d0aa79SNicholas Bellinger */ 46352d0aa79SNicholas Bellinger check_prot: 46452d0aa79SNicholas Bellinger if (sess->se_sess->sup_prot_ops & 46552d0aa79SNicholas Bellinger (TARGET_PROT_DOUT_STRIP | TARGET_PROT_DOUT_PASS | 46652d0aa79SNicholas Bellinger TARGET_PROT_DOUT_INSERT)) { 46752d0aa79SNicholas Bellinger 46879d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "ImmediateData=No")) 46952d0aa79SNicholas Bellinger return -1; 47052d0aa79SNicholas Bellinger 47179d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "InitialR2T=Yes")) 47252d0aa79SNicholas Bellinger return -1; 47379d59d08SRoland Dreier 47452d0aa79SNicholas Bellinger pr_debug("Forcing ImmediateData=No + InitialR2T=Yes for" 47552d0aa79SNicholas Bellinger " T10-PI enabled ISER session\n"); 47652d0aa79SNicholas Bellinger } 47703aa2070SNicholas Bellinger } 478e48354ceSNicholas Bellinger 479e48354ceSNicholas Bellinger return 0; 480e48354ceSNicholas Bellinger } 481e48354ceSNicholas Bellinger 482e48354ceSNicholas Bellinger /* 483e48354ceSNicholas Bellinger * Remove PSTATE_NEGOTIATE for the four FIM related keys. 484e48354ceSNicholas Bellinger * The Initiator node will be able to enable FIM by proposing them itself. 485e48354ceSNicholas Bellinger */ 486e48354ceSNicholas Bellinger int iscsi_login_disable_FIM_keys( 487e48354ceSNicholas Bellinger struct iscsi_param_list *param_list, 488e48354ceSNicholas Bellinger struct iscsi_conn *conn) 489e48354ceSNicholas Bellinger { 490e48354ceSNicholas Bellinger struct iscsi_param *param; 491e48354ceSNicholas Bellinger 492e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("OFMarker", param_list); 493e48354ceSNicholas Bellinger if (!param) { 494e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 495e48354ceSNicholas Bellinger " OFMarker failed\n"); 496e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 497e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 498e48354ceSNicholas Bellinger return -1; 499e48354ceSNicholas Bellinger } 500e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 501e48354ceSNicholas Bellinger 502e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("OFMarkInt", param_list); 503e48354ceSNicholas Bellinger if (!param) { 504e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 505e48354ceSNicholas Bellinger " IFMarker failed\n"); 506e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 507e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 508e48354ceSNicholas Bellinger return -1; 509e48354ceSNicholas Bellinger } 510e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 511e48354ceSNicholas Bellinger 512e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("IFMarker", param_list); 513e48354ceSNicholas Bellinger if (!param) { 514e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 515e48354ceSNicholas Bellinger " IFMarker failed\n"); 516e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 517e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 518e48354ceSNicholas Bellinger return -1; 519e48354ceSNicholas Bellinger } 520e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 521e48354ceSNicholas Bellinger 522e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("IFMarkInt", param_list); 523e48354ceSNicholas Bellinger if (!param) { 524e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 525e48354ceSNicholas Bellinger " IFMarker failed\n"); 526e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 527e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 528e48354ceSNicholas Bellinger return -1; 529e48354ceSNicholas Bellinger } 530e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 531e48354ceSNicholas Bellinger 532e48354ceSNicholas Bellinger return 0; 533e48354ceSNicholas Bellinger } 534e48354ceSNicholas Bellinger 535e48354ceSNicholas Bellinger static int iscsi_login_non_zero_tsih_s1( 536e48354ceSNicholas Bellinger struct iscsi_conn *conn, 537e48354ceSNicholas Bellinger unsigned char *buf) 538e48354ceSNicholas Bellinger { 539e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 540e48354ceSNicholas Bellinger 541e48354ceSNicholas Bellinger iscsi_login_set_conn_values(NULL, conn, pdu->cid); 542e48354ceSNicholas Bellinger return 0; 543e48354ceSNicholas Bellinger } 544e48354ceSNicholas Bellinger 545e48354ceSNicholas Bellinger /* 546e48354ceSNicholas Bellinger * Add a new connection to an existing session. 547e48354ceSNicholas Bellinger */ 548e48354ceSNicholas Bellinger static int iscsi_login_non_zero_tsih_s2( 549e48354ceSNicholas Bellinger struct iscsi_conn *conn, 550e48354ceSNicholas Bellinger unsigned char *buf) 551e48354ceSNicholas Bellinger { 552e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->tpg; 553e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL, *sess_p = NULL; 554e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 555e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 556e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 55703aa2070SNicholas Bellinger bool iser = false; 558e48354ceSNicholas Bellinger 559e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 560e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 561e48354ceSNicholas Bellinger sess_list) { 562e48354ceSNicholas Bellinger 563e48354ceSNicholas Bellinger sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; 564e48354ceSNicholas Bellinger if (atomic_read(&sess_p->session_fall_back_to_erl0) || 565e48354ceSNicholas Bellinger atomic_read(&sess_p->session_logout) || 566e48354ceSNicholas Bellinger (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) 567e48354ceSNicholas Bellinger continue; 5688359cf43SJörn Engel if (!memcmp(sess_p->isid, pdu->isid, 6) && 56950e5c87dSChristoph Hellwig (sess_p->tsih == be16_to_cpu(pdu->tsih))) { 570e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess_p); 571e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess_p); 572e48354ceSNicholas Bellinger sess = sess_p; 573e48354ceSNicholas Bellinger break; 574e48354ceSNicholas Bellinger } 575e48354ceSNicholas Bellinger } 576e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 577e48354ceSNicholas Bellinger 578e48354ceSNicholas Bellinger /* 579e48354ceSNicholas Bellinger * If the Time2Retain handler has expired, the session is already gone. 580e48354ceSNicholas Bellinger */ 581e48354ceSNicholas Bellinger if (!sess) { 582e48354ceSNicholas Bellinger pr_err("Initiator attempting to add a connection to" 583e48354ceSNicholas Bellinger " a non-existent session, rejecting iSCSI Login.\n"); 584e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 585e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_SESSION); 586e48354ceSNicholas Bellinger return -1; 587e48354ceSNicholas Bellinger } 588e48354ceSNicholas Bellinger 589e48354ceSNicholas Bellinger /* 590e48354ceSNicholas Bellinger * Stop the Time2Retain timer if this is a failed session, we restart 591e48354ceSNicholas Bellinger * the timer if the login is not successful. 592e48354ceSNicholas Bellinger */ 593e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 594e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) 595e48354ceSNicholas Bellinger atomic_set(&sess->session_continuation, 1); 596e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 597e48354ceSNicholas Bellinger 598e48354ceSNicholas Bellinger iscsi_login_set_conn_values(sess, conn, pdu->cid); 599e48354ceSNicholas Bellinger 600e48354ceSNicholas Bellinger if (iscsi_copy_param_list(&conn->param_list, 60160bfcf8eSAndy Grover conn->tpg->param_list, 0) < 0) { 602e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 603e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 604e48354ceSNicholas Bellinger return -1; 605e48354ceSNicholas Bellinger } 606e48354ceSNicholas Bellinger 60703aa2070SNicholas Bellinger if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) 60803aa2070SNicholas Bellinger iser = true; 60903aa2070SNicholas Bellinger 61003aa2070SNicholas Bellinger iscsi_set_keys_to_negotiate(conn->param_list, iser); 611e48354ceSNicholas Bellinger /* 612e48354ceSNicholas Bellinger * Need to send TargetPortalGroupTag back in first login response 613e48354ceSNicholas Bellinger * on any iSCSI connection where the Initiator provides TargetName. 614e48354ceSNicholas Bellinger * See 5.3.1. Login Phase Start 615e48354ceSNicholas Bellinger * 616e48354ceSNicholas Bellinger * In our case, we have already located the struct iscsi_tiqn at this point. 617e48354ceSNicholas Bellinger */ 61879d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) 619e48354ceSNicholas Bellinger return -1; 620e48354ceSNicholas Bellinger 621e48354ceSNicholas Bellinger return iscsi_login_disable_FIM_keys(conn->param_list, conn); 622e48354ceSNicholas Bellinger } 623e48354ceSNicholas Bellinger 624e48354ceSNicholas Bellinger int iscsi_login_post_auth_non_zero_tsih( 625e48354ceSNicholas Bellinger struct iscsi_conn *conn, 626e48354ceSNicholas Bellinger u16 cid, 627e48354ceSNicholas Bellinger u32 exp_statsn) 628e48354ceSNicholas Bellinger { 629e48354ceSNicholas Bellinger struct iscsi_conn *conn_ptr = NULL; 630e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr = NULL; 631e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 632e48354ceSNicholas Bellinger 633e48354ceSNicholas Bellinger /* 634e48354ceSNicholas Bellinger * By following item 5 in the login table, if we have found 635e48354ceSNicholas Bellinger * an existing ISID and a valid/existing TSIH and an existing 636e48354ceSNicholas Bellinger * CID we do connection reinstatement. Currently we dont not 637e48354ceSNicholas Bellinger * support it so we send back an non-zero status class to the 638e48354ceSNicholas Bellinger * initiator and release the new connection. 639e48354ceSNicholas Bellinger */ 640e48354ceSNicholas Bellinger conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); 641ee1b1b9cSAndy Grover if (conn_ptr) { 642e48354ceSNicholas Bellinger pr_err("Connection exists with CID %hu for %s," 643e48354ceSNicholas Bellinger " performing connection reinstatement.\n", 644e48354ceSNicholas Bellinger conn_ptr->cid, sess->sess_ops->InitiatorName); 645e48354ceSNicholas Bellinger 646e48354ceSNicholas Bellinger iscsit_connection_reinstatement_rcfr(conn_ptr); 647e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_ptr); 648e48354ceSNicholas Bellinger } 649e48354ceSNicholas Bellinger 650e48354ceSNicholas Bellinger /* 651e48354ceSNicholas Bellinger * Check for any connection recovery entires containing CID. 652e48354ceSNicholas Bellinger * We use the original ExpStatSN sent in the first login request 653e48354ceSNicholas Bellinger * to acknowledge commands for the failed connection. 654e48354ceSNicholas Bellinger * 655e48354ceSNicholas Bellinger * Also note that an explict logout may have already been sent, 656e48354ceSNicholas Bellinger * but the response may not be sent due to additional connection 657e48354ceSNicholas Bellinger * loss. 658e48354ceSNicholas Bellinger */ 659e48354ceSNicholas Bellinger if (sess->sess_ops->ErrorRecoveryLevel == 2) { 660e48354ceSNicholas Bellinger cr = iscsit_get_inactive_connection_recovery_entry( 661e48354ceSNicholas Bellinger sess, cid); 662ee1b1b9cSAndy Grover if (cr) { 663e48354ceSNicholas Bellinger pr_debug("Performing implicit logout" 664e48354ceSNicholas Bellinger " for connection recovery on CID: %hu\n", 665e48354ceSNicholas Bellinger conn->cid); 666e48354ceSNicholas Bellinger iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); 667e48354ceSNicholas Bellinger } 668e48354ceSNicholas Bellinger } 669e48354ceSNicholas Bellinger 670e48354ceSNicholas Bellinger /* 671e48354ceSNicholas Bellinger * Else we follow item 4 from the login table in that we have 672e48354ceSNicholas Bellinger * found an existing ISID and a valid/existing TSIH and a new 673e48354ceSNicholas Bellinger * CID we go ahead and continue to add a new connection to the 674e48354ceSNicholas Bellinger * session. 675e48354ceSNicholas Bellinger */ 676e48354ceSNicholas Bellinger pr_debug("Adding CID %hu to existing session for %s.\n", 677e48354ceSNicholas Bellinger cid, sess->sess_ops->InitiatorName); 678e48354ceSNicholas Bellinger 679e48354ceSNicholas Bellinger if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { 680e48354ceSNicholas Bellinger pr_err("Adding additional connection to this session" 681e48354ceSNicholas Bellinger " would exceed MaxConnections %d, login failed.\n", 682e48354ceSNicholas Bellinger sess->sess_ops->MaxConnections); 683e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 684e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_ISID_ERROR); 685e48354ceSNicholas Bellinger return -1; 686e48354ceSNicholas Bellinger } 687e48354ceSNicholas Bellinger 688e48354ceSNicholas Bellinger return 0; 689e48354ceSNicholas Bellinger } 690e48354ceSNicholas Bellinger 691e48354ceSNicholas Bellinger static void iscsi_post_login_start_timers(struct iscsi_conn *conn) 692e48354ceSNicholas Bellinger { 693e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 69403aa2070SNicholas Bellinger /* 69503aa2070SNicholas Bellinger * FIXME: Unsolicitied NopIN support for ISER 69603aa2070SNicholas Bellinger */ 69703aa2070SNicholas Bellinger if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) 69803aa2070SNicholas Bellinger return; 699e48354ceSNicholas Bellinger 700e48354ceSNicholas Bellinger if (!sess->sess_ops->SessionType) 701e48354ceSNicholas Bellinger iscsit_start_nopin_timer(conn); 702e48354ceSNicholas Bellinger } 703e48354ceSNicholas Bellinger 704a91eb7d9SNicholas Bellinger int iscsi_post_login_handler( 705e48354ceSNicholas Bellinger struct iscsi_np *np, 706e48354ceSNicholas Bellinger struct iscsi_conn *conn, 707e48354ceSNicholas Bellinger u8 zero_tsih) 708e48354ceSNicholas Bellinger { 709e48354ceSNicholas Bellinger int stop_timer = 0; 710e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 711e48354ceSNicholas Bellinger struct se_session *se_sess = sess->se_sess; 71260bfcf8eSAndy Grover struct iscsi_portal_group *tpg = sess->tpg; 713e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 714e48354ceSNicholas Bellinger struct iscsi_thread_set *ts; 715e48354ceSNicholas Bellinger 716e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 717e48354ceSNicholas Bellinger 718e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, 719e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_ACCEPT); 720e48354ceSNicholas Bellinger 721e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); 722e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_LOGGED_IN; 723e48354ceSNicholas Bellinger 724e48354ceSNicholas Bellinger iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); 725e48354ceSNicholas Bellinger iscsit_set_sync_and_steering_values(conn); 726e48354ceSNicholas Bellinger /* 727e48354ceSNicholas Bellinger * SCSI Initiator -> SCSI Target Port Mapping 728e48354ceSNicholas Bellinger */ 729e48354ceSNicholas Bellinger ts = iscsi_get_thread_set(); 730e48354ceSNicholas Bellinger if (!zero_tsih) { 731e48354ceSNicholas Bellinger iscsi_set_session_parameters(sess->sess_ops, 732e48354ceSNicholas Bellinger conn->param_list, 0); 733e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 734e48354ceSNicholas Bellinger conn->param_list = NULL; 735e48354ceSNicholas Bellinger 736e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 737e48354ceSNicholas Bellinger atomic_set(&sess->session_continuation, 0); 738e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) { 739e48354ceSNicholas Bellinger pr_debug("Moving to" 740e48354ceSNicholas Bellinger " TARG_SESS_STATE_LOGGED_IN.\n"); 741e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_LOGGED_IN; 742e48354ceSNicholas Bellinger stop_timer = 1; 743e48354ceSNicholas Bellinger } 744e48354ceSNicholas Bellinger 745e48354ceSNicholas Bellinger pr_debug("iSCSI Login successful on CID: %hu from %s to" 7462f9bc894SNicholas Bellinger " %s:%hu,%hu\n", conn->cid, conn->login_ip, 7472f9bc894SNicholas Bellinger conn->local_ip, conn->local_port, tpg->tpgt); 748e48354ceSNicholas Bellinger 749e48354ceSNicholas Bellinger list_add_tail(&conn->conn_list, &sess->sess_conn_list); 750e48354ceSNicholas Bellinger atomic_inc(&sess->nconn); 751e48354ceSNicholas Bellinger pr_debug("Incremented iSCSI Connection count to %hu" 752e48354ceSNicholas Bellinger " from node: %s\n", atomic_read(&sess->nconn), 753e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 754e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 755e48354ceSNicholas Bellinger 756e48354ceSNicholas Bellinger iscsi_post_login_start_timers(conn); 757baa4d64bSNicholas Bellinger 758e48354ceSNicholas Bellinger iscsi_activate_thread_set(conn, ts); 759e48354ceSNicholas Bellinger /* 760e48354ceSNicholas Bellinger * Determine CPU mask to ensure connection's RX and TX kthreads 761e48354ceSNicholas Bellinger * are scheduled on the same CPU. 762e48354ceSNicholas Bellinger */ 763e48354ceSNicholas Bellinger iscsit_thread_get_cpumask(conn); 764e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 1; 765e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 1; 766e48354ceSNicholas Bellinger 767e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 768e48354ceSNicholas Bellinger if (stop_timer) { 769e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 770e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess); 771e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 772e48354ceSNicholas Bellinger } 773e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 774e48354ceSNicholas Bellinger return 0; 775e48354ceSNicholas Bellinger } 776e48354ceSNicholas Bellinger 777e48354ceSNicholas Bellinger iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); 778e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 779e48354ceSNicholas Bellinger conn->param_list = NULL; 780e48354ceSNicholas Bellinger 781e48354ceSNicholas Bellinger iscsit_determine_maxcmdsn(sess); 782e48354ceSNicholas Bellinger 783e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 784e48354ceSNicholas Bellinger __transport_register_session(&sess->tpg->tpg_se_tpg, 7858359cf43SJörn Engel se_sess->se_node_acl, se_sess, sess); 786e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); 787e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_LOGGED_IN; 788e48354ceSNicholas Bellinger 789e48354ceSNicholas Bellinger pr_debug("iSCSI Login successful on CID: %hu from %s to %s:%hu,%hu\n", 7902f9bc894SNicholas Bellinger conn->cid, conn->login_ip, conn->local_ip, conn->local_port, 7912f9bc894SNicholas Bellinger tpg->tpgt); 792e48354ceSNicholas Bellinger 793e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 794e48354ceSNicholas Bellinger list_add_tail(&conn->conn_list, &sess->sess_conn_list); 795e48354ceSNicholas Bellinger atomic_inc(&sess->nconn); 796e48354ceSNicholas Bellinger pr_debug("Incremented iSCSI Connection count to %hu from node:" 797e48354ceSNicholas Bellinger " %s\n", atomic_read(&sess->nconn), 798e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 799e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 800e48354ceSNicholas Bellinger 801e48354ceSNicholas Bellinger sess->sid = tpg->sid++; 802e48354ceSNicholas Bellinger if (!sess->sid) 803e48354ceSNicholas Bellinger sess->sid = tpg->sid++; 804e48354ceSNicholas Bellinger pr_debug("Established iSCSI session from node: %s\n", 805e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 806e48354ceSNicholas Bellinger 807e48354ceSNicholas Bellinger tpg->nsessions++; 808e48354ceSNicholas Bellinger if (tpg->tpg_tiqn) 809e48354ceSNicholas Bellinger tpg->tpg_tiqn->tiqn_nsessions++; 810e48354ceSNicholas Bellinger 811e48354ceSNicholas Bellinger pr_debug("Incremented number of active iSCSI sessions to %u on" 812e48354ceSNicholas Bellinger " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); 813e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 814e48354ceSNicholas Bellinger 815e48354ceSNicholas Bellinger iscsi_post_login_start_timers(conn); 816e48354ceSNicholas Bellinger iscsi_activate_thread_set(conn, ts); 817e48354ceSNicholas Bellinger /* 818e48354ceSNicholas Bellinger * Determine CPU mask to ensure connection's RX and TX kthreads 819e48354ceSNicholas Bellinger * are scheduled on the same CPU. 820e48354ceSNicholas Bellinger */ 821e48354ceSNicholas Bellinger iscsit_thread_get_cpumask(conn); 822e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 1; 823e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 1; 824e48354ceSNicholas Bellinger 825e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 826e48354ceSNicholas Bellinger 827e48354ceSNicholas Bellinger return 0; 828e48354ceSNicholas Bellinger } 829e48354ceSNicholas Bellinger 830e48354ceSNicholas Bellinger static void iscsi_handle_login_thread_timeout(unsigned long data) 831e48354ceSNicholas Bellinger { 832e48354ceSNicholas Bellinger struct iscsi_np *np = (struct iscsi_np *) data; 833e48354ceSNicholas Bellinger 834e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 835e48354ceSNicholas Bellinger pr_err("iSCSI Login timeout on Network Portal %s:%hu\n", 836e48354ceSNicholas Bellinger np->np_ip, np->np_port); 837e48354ceSNicholas Bellinger 838e48354ceSNicholas Bellinger if (np->np_login_timer_flags & ISCSI_TF_STOP) { 839e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 840e48354ceSNicholas Bellinger return; 841e48354ceSNicholas Bellinger } 842e48354ceSNicholas Bellinger 843e48354ceSNicholas Bellinger if (np->np_thread) 844e48354ceSNicholas Bellinger send_sig(SIGINT, np->np_thread, 1); 845e48354ceSNicholas Bellinger 846e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; 847e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 848e48354ceSNicholas Bellinger } 849e48354ceSNicholas Bellinger 850e48354ceSNicholas Bellinger static void iscsi_start_login_thread_timer(struct iscsi_np *np) 851e48354ceSNicholas Bellinger { 852e48354ceSNicholas Bellinger /* 853e48354ceSNicholas Bellinger * This used the TA_LOGIN_TIMEOUT constant because at this 854e48354ceSNicholas Bellinger * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout 855e48354ceSNicholas Bellinger */ 856e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 857e48354ceSNicholas Bellinger init_timer(&np->np_login_timer); 858e48354ceSNicholas Bellinger np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ); 859e48354ceSNicholas Bellinger np->np_login_timer.data = (unsigned long)np; 860e48354ceSNicholas Bellinger np->np_login_timer.function = iscsi_handle_login_thread_timeout; 861e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_STOP; 862e48354ceSNicholas Bellinger np->np_login_timer_flags |= ISCSI_TF_RUNNING; 863e48354ceSNicholas Bellinger add_timer(&np->np_login_timer); 864e48354ceSNicholas Bellinger 865e48354ceSNicholas Bellinger pr_debug("Added timeout timer to iSCSI login request for" 866e48354ceSNicholas Bellinger " %u seconds.\n", TA_LOGIN_TIMEOUT); 867e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 868e48354ceSNicholas Bellinger } 869e48354ceSNicholas Bellinger 870e48354ceSNicholas Bellinger static void iscsi_stop_login_thread_timer(struct iscsi_np *np) 871e48354ceSNicholas Bellinger { 872e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 873e48354ceSNicholas Bellinger if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { 874e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 875e48354ceSNicholas Bellinger return; 876e48354ceSNicholas Bellinger } 877e48354ceSNicholas Bellinger np->np_login_timer_flags |= ISCSI_TF_STOP; 878e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 879e48354ceSNicholas Bellinger 880e48354ceSNicholas Bellinger del_timer_sync(&np->np_login_timer); 881e48354ceSNicholas Bellinger 882e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 883e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; 884e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 885e48354ceSNicholas Bellinger } 886e48354ceSNicholas Bellinger 887baa4d64bSNicholas Bellinger int iscsit_setup_np( 888e48354ceSNicholas Bellinger struct iscsi_np *np, 889e48354ceSNicholas Bellinger struct __kernel_sockaddr_storage *sockaddr) 890e48354ceSNicholas Bellinger { 891baa4d64bSNicholas Bellinger struct socket *sock = NULL; 892837f6452SNicholas Bellinger int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len; 893e48354ceSNicholas Bellinger 894e48354ceSNicholas Bellinger switch (np->np_network_transport) { 895e48354ceSNicholas Bellinger case ISCSI_TCP: 896e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_TCP; 897e48354ceSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 898e48354ceSNicholas Bellinger break; 899e48354ceSNicholas Bellinger case ISCSI_SCTP_TCP: 900e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_SCTP; 901e48354ceSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 902e48354ceSNicholas Bellinger break; 903e48354ceSNicholas Bellinger case ISCSI_SCTP_UDP: 904e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_SCTP; 905e48354ceSNicholas Bellinger np->np_sock_type = SOCK_SEQPACKET; 906e48354ceSNicholas Bellinger break; 907e48354ceSNicholas Bellinger default: 908e48354ceSNicholas Bellinger pr_err("Unsupported network_transport: %d\n", 909e48354ceSNicholas Bellinger np->np_network_transport); 910e48354ceSNicholas Bellinger return -EINVAL; 911e48354ceSNicholas Bellinger } 912e48354ceSNicholas Bellinger 913baa4d64bSNicholas Bellinger np->np_ip_proto = IPPROTO_TCP; 914baa4d64bSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 915baa4d64bSNicholas Bellinger 916e48354ceSNicholas Bellinger ret = sock_create(sockaddr->ss_family, np->np_sock_type, 917e48354ceSNicholas Bellinger np->np_ip_proto, &sock); 918e48354ceSNicholas Bellinger if (ret < 0) { 919e48354ceSNicholas Bellinger pr_err("sock_create() failed.\n"); 920e48354ceSNicholas Bellinger return ret; 921e48354ceSNicholas Bellinger } 922e48354ceSNicholas Bellinger np->np_socket = sock; 923e48354ceSNicholas Bellinger /* 924e48354ceSNicholas Bellinger * Setup the np->np_sockaddr from the passed sockaddr setup 925e48354ceSNicholas Bellinger * in iscsi_target_configfs.c code.. 926e48354ceSNicholas Bellinger */ 9278359cf43SJörn Engel memcpy(&np->np_sockaddr, sockaddr, 928e48354ceSNicholas Bellinger sizeof(struct __kernel_sockaddr_storage)); 929e48354ceSNicholas Bellinger 930e48354ceSNicholas Bellinger if (sockaddr->ss_family == AF_INET6) 931e48354ceSNicholas Bellinger len = sizeof(struct sockaddr_in6); 932e48354ceSNicholas Bellinger else 933e48354ceSNicholas Bellinger len = sizeof(struct sockaddr_in); 934e48354ceSNicholas Bellinger /* 935e48354ceSNicholas Bellinger * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. 936e48354ceSNicholas Bellinger */ 9378359cf43SJörn Engel /* FIXME: Someone please explain why this is endian-safe */ 938e48354ceSNicholas Bellinger opt = 1; 939e48354ceSNicholas Bellinger if (np->np_network_transport == ISCSI_TCP) { 940e48354ceSNicholas Bellinger ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, 941e48354ceSNicholas Bellinger (char *)&opt, sizeof(opt)); 942e48354ceSNicholas Bellinger if (ret < 0) { 943e48354ceSNicholas Bellinger pr_err("kernel_setsockopt() for TCP_NODELAY" 944e48354ceSNicholas Bellinger " failed: %d\n", ret); 945e48354ceSNicholas Bellinger goto fail; 946e48354ceSNicholas Bellinger } 947e48354ceSNicholas Bellinger } 948e48354ceSNicholas Bellinger 9498359cf43SJörn Engel /* FIXME: Someone please explain why this is endian-safe */ 950e48354ceSNicholas Bellinger ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, 951e48354ceSNicholas Bellinger (char *)&opt, sizeof(opt)); 952e48354ceSNicholas Bellinger if (ret < 0) { 953e48354ceSNicholas Bellinger pr_err("kernel_setsockopt() for SO_REUSEADDR" 954e48354ceSNicholas Bellinger " failed\n"); 955e48354ceSNicholas Bellinger goto fail; 956e48354ceSNicholas Bellinger } 957e48354ceSNicholas Bellinger 9589f9ef6d3SDax Kelson ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, 9599f9ef6d3SDax Kelson (char *)&opt, sizeof(opt)); 9609f9ef6d3SDax Kelson if (ret < 0) { 9619f9ef6d3SDax Kelson pr_err("kernel_setsockopt() for IP_FREEBIND" 9629f9ef6d3SDax Kelson " failed\n"); 9639f9ef6d3SDax Kelson goto fail; 9649f9ef6d3SDax Kelson } 9659f9ef6d3SDax Kelson 966e48354ceSNicholas Bellinger ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); 967e48354ceSNicholas Bellinger if (ret < 0) { 968e48354ceSNicholas Bellinger pr_err("kernel_bind() failed: %d\n", ret); 969e48354ceSNicholas Bellinger goto fail; 970e48354ceSNicholas Bellinger } 971e48354ceSNicholas Bellinger 972e48354ceSNicholas Bellinger ret = kernel_listen(sock, backlog); 973e48354ceSNicholas Bellinger if (ret != 0) { 974e48354ceSNicholas Bellinger pr_err("kernel_listen() failed: %d\n", ret); 975e48354ceSNicholas Bellinger goto fail; 976e48354ceSNicholas Bellinger } 977e48354ceSNicholas Bellinger 978e48354ceSNicholas Bellinger return 0; 979e48354ceSNicholas Bellinger fail: 980e48354ceSNicholas Bellinger np->np_socket = NULL; 981e48354ceSNicholas Bellinger sock_release(sock); 982e48354ceSNicholas Bellinger return ret; 983e48354ceSNicholas Bellinger } 984e48354ceSNicholas Bellinger 985baa4d64bSNicholas Bellinger int iscsi_target_setup_login_socket( 986baa4d64bSNicholas Bellinger struct iscsi_np *np, 987baa4d64bSNicholas Bellinger struct __kernel_sockaddr_storage *sockaddr) 988baa4d64bSNicholas Bellinger { 989baa4d64bSNicholas Bellinger struct iscsit_transport *t; 990baa4d64bSNicholas Bellinger int rc; 991baa4d64bSNicholas Bellinger 992baa4d64bSNicholas Bellinger t = iscsit_get_transport(np->np_network_transport); 993baa4d64bSNicholas Bellinger if (!t) 994baa4d64bSNicholas Bellinger return -EINVAL; 995baa4d64bSNicholas Bellinger 996baa4d64bSNicholas Bellinger rc = t->iscsit_setup_np(np, sockaddr); 997baa4d64bSNicholas Bellinger if (rc < 0) { 998baa4d64bSNicholas Bellinger iscsit_put_transport(t); 999baa4d64bSNicholas Bellinger return rc; 1000baa4d64bSNicholas Bellinger } 1001baa4d64bSNicholas Bellinger 1002baa4d64bSNicholas Bellinger np->np_transport = t; 100314f4b54fSSagi Grimberg np->enabled = true; 1004baa4d64bSNicholas Bellinger return 0; 1005baa4d64bSNicholas Bellinger } 1006baa4d64bSNicholas Bellinger 1007baa4d64bSNicholas Bellinger int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) 1008baa4d64bSNicholas Bellinger { 1009baa4d64bSNicholas Bellinger struct socket *new_sock, *sock = np->np_socket; 1010baa4d64bSNicholas Bellinger struct sockaddr_in sock_in; 1011baa4d64bSNicholas Bellinger struct sockaddr_in6 sock_in6; 1012baa4d64bSNicholas Bellinger int rc, err; 1013baa4d64bSNicholas Bellinger 1014baa4d64bSNicholas Bellinger rc = kernel_accept(sock, &new_sock, 0); 1015baa4d64bSNicholas Bellinger if (rc < 0) 1016baa4d64bSNicholas Bellinger return rc; 1017baa4d64bSNicholas Bellinger 1018baa4d64bSNicholas Bellinger conn->sock = new_sock; 1019baa4d64bSNicholas Bellinger conn->login_family = np->np_sockaddr.ss_family; 1020baa4d64bSNicholas Bellinger 1021baa4d64bSNicholas Bellinger if (np->np_sockaddr.ss_family == AF_INET6) { 1022baa4d64bSNicholas Bellinger memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); 1023baa4d64bSNicholas Bellinger 1024baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 1025baa4d64bSNicholas Bellinger (struct sockaddr *)&sock_in6, &err, 1); 1026baa4d64bSNicholas Bellinger if (!rc) { 1027dfecf611SChris Leech if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) 1028dfecf611SChris Leech snprintf(conn->login_ip, sizeof(conn->login_ip), "[%pI6c]", 1029baa4d64bSNicholas Bellinger &sock_in6.sin6_addr.in6_u); 1030dfecf611SChris Leech else 1031dfecf611SChris Leech snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI4", 1032dfecf611SChris Leech &sock_in6.sin6_addr.s6_addr32[3]); 1033baa4d64bSNicholas Bellinger conn->login_port = ntohs(sock_in6.sin6_port); 1034baa4d64bSNicholas Bellinger } 1035baa4d64bSNicholas Bellinger 1036baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 1037baa4d64bSNicholas Bellinger (struct sockaddr *)&sock_in6, &err, 0); 1038baa4d64bSNicholas Bellinger if (!rc) { 1039dfecf611SChris Leech if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) 1040dfecf611SChris Leech snprintf(conn->local_ip, sizeof(conn->local_ip), "[%pI6c]", 1041baa4d64bSNicholas Bellinger &sock_in6.sin6_addr.in6_u); 1042dfecf611SChris Leech else 1043dfecf611SChris Leech snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI4", 1044dfecf611SChris Leech &sock_in6.sin6_addr.s6_addr32[3]); 1045baa4d64bSNicholas Bellinger conn->local_port = ntohs(sock_in6.sin6_port); 1046baa4d64bSNicholas Bellinger } 1047baa4d64bSNicholas Bellinger } else { 1048baa4d64bSNicholas Bellinger memset(&sock_in, 0, sizeof(struct sockaddr_in)); 1049baa4d64bSNicholas Bellinger 1050baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 1051baa4d64bSNicholas Bellinger (struct sockaddr *)&sock_in, &err, 1); 1052baa4d64bSNicholas Bellinger if (!rc) { 1053baa4d64bSNicholas Bellinger sprintf(conn->login_ip, "%pI4", 1054baa4d64bSNicholas Bellinger &sock_in.sin_addr.s_addr); 1055baa4d64bSNicholas Bellinger conn->login_port = ntohs(sock_in.sin_port); 1056baa4d64bSNicholas Bellinger } 1057baa4d64bSNicholas Bellinger 1058baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 1059baa4d64bSNicholas Bellinger (struct sockaddr *)&sock_in, &err, 0); 1060baa4d64bSNicholas Bellinger if (!rc) { 1061baa4d64bSNicholas Bellinger sprintf(conn->local_ip, "%pI4", 1062baa4d64bSNicholas Bellinger &sock_in.sin_addr.s_addr); 1063baa4d64bSNicholas Bellinger conn->local_port = ntohs(sock_in.sin_port); 1064baa4d64bSNicholas Bellinger } 1065baa4d64bSNicholas Bellinger } 1066baa4d64bSNicholas Bellinger 1067baa4d64bSNicholas Bellinger return 0; 1068baa4d64bSNicholas Bellinger } 1069baa4d64bSNicholas Bellinger 1070baa4d64bSNicholas Bellinger int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) 1071baa4d64bSNicholas Bellinger { 1072baa4d64bSNicholas Bellinger struct iscsi_login_req *login_req; 1073baa4d64bSNicholas Bellinger u32 padding = 0, payload_length; 1074baa4d64bSNicholas Bellinger 1075baa4d64bSNicholas Bellinger if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0) 1076baa4d64bSNicholas Bellinger return -1; 1077baa4d64bSNicholas Bellinger 1078baa4d64bSNicholas Bellinger login_req = (struct iscsi_login_req *)login->req; 1079baa4d64bSNicholas Bellinger payload_length = ntoh24(login_req->dlength); 1080baa4d64bSNicholas Bellinger padding = ((-payload_length) & 3); 1081baa4d64bSNicholas Bellinger 1082baa4d64bSNicholas Bellinger pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x," 1083baa4d64bSNicholas Bellinger " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n", 1084baa4d64bSNicholas Bellinger login_req->flags, login_req->itt, login_req->cmdsn, 1085baa4d64bSNicholas Bellinger login_req->exp_statsn, login_req->cid, payload_length); 1086baa4d64bSNicholas Bellinger /* 1087baa4d64bSNicholas Bellinger * Setup the initial iscsi_login values from the leading 1088baa4d64bSNicholas Bellinger * login request PDU. 1089baa4d64bSNicholas Bellinger */ 1090baa4d64bSNicholas Bellinger if (login->first_request) { 1091baa4d64bSNicholas Bellinger login_req = (struct iscsi_login_req *)login->req; 1092baa4d64bSNicholas Bellinger login->leading_connection = (!login_req->tsih) ? 1 : 0; 10933e1c81a9SNicholas Bellinger login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); 1094baa4d64bSNicholas Bellinger login->version_min = login_req->min_version; 1095baa4d64bSNicholas Bellinger login->version_max = login_req->max_version; 1096baa4d64bSNicholas Bellinger memcpy(login->isid, login_req->isid, 6); 1097baa4d64bSNicholas Bellinger login->cmd_sn = be32_to_cpu(login_req->cmdsn); 1098baa4d64bSNicholas Bellinger login->init_task_tag = login_req->itt; 1099baa4d64bSNicholas Bellinger login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); 1100baa4d64bSNicholas Bellinger login->cid = be16_to_cpu(login_req->cid); 1101baa4d64bSNicholas Bellinger login->tsih = be16_to_cpu(login_req->tsih); 1102baa4d64bSNicholas Bellinger } 1103baa4d64bSNicholas Bellinger 1104baa4d64bSNicholas Bellinger if (iscsi_target_check_login_request(conn, login) < 0) 1105baa4d64bSNicholas Bellinger return -1; 1106baa4d64bSNicholas Bellinger 1107baa4d64bSNicholas Bellinger memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS); 1108baa4d64bSNicholas Bellinger if (iscsi_login_rx_data(conn, login->req_buf, 1109baa4d64bSNicholas Bellinger payload_length + padding) < 0) 1110baa4d64bSNicholas Bellinger return -1; 1111baa4d64bSNicholas Bellinger 1112baa4d64bSNicholas Bellinger return 0; 1113baa4d64bSNicholas Bellinger } 1114baa4d64bSNicholas Bellinger 1115baa4d64bSNicholas Bellinger int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, 1116baa4d64bSNicholas Bellinger u32 length) 1117baa4d64bSNicholas Bellinger { 1118baa4d64bSNicholas Bellinger if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0) 1119baa4d64bSNicholas Bellinger return -1; 1120baa4d64bSNicholas Bellinger 1121baa4d64bSNicholas Bellinger return 0; 1122baa4d64bSNicholas Bellinger } 1123baa4d64bSNicholas Bellinger 1124baa4d64bSNicholas Bellinger static int 1125baa4d64bSNicholas Bellinger iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t) 1126baa4d64bSNicholas Bellinger { 1127baa4d64bSNicholas Bellinger int rc; 1128baa4d64bSNicholas Bellinger 1129baa4d64bSNicholas Bellinger if (!t->owner) { 1130baa4d64bSNicholas Bellinger conn->conn_transport = t; 1131baa4d64bSNicholas Bellinger return 0; 1132baa4d64bSNicholas Bellinger } 1133baa4d64bSNicholas Bellinger 1134baa4d64bSNicholas Bellinger rc = try_module_get(t->owner); 1135baa4d64bSNicholas Bellinger if (!rc) { 1136baa4d64bSNicholas Bellinger pr_err("try_module_get() failed for %s\n", t->name); 1137baa4d64bSNicholas Bellinger return -EINVAL; 1138baa4d64bSNicholas Bellinger } 1139baa4d64bSNicholas Bellinger 1140baa4d64bSNicholas Bellinger conn->conn_transport = t; 1141baa4d64bSNicholas Bellinger return 0; 1142baa4d64bSNicholas Bellinger } 1143baa4d64bSNicholas Bellinger 1144a91eb7d9SNicholas Bellinger void iscsi_target_login_sess_out(struct iscsi_conn *conn, 1145a91eb7d9SNicholas Bellinger struct iscsi_np *np, bool zero_tsih, bool new_sess) 1146a91eb7d9SNicholas Bellinger { 11470bcc297eSChristophe Vu-Brugier if (!new_sess) 1148a91eb7d9SNicholas Bellinger goto old_sess_out; 1149a91eb7d9SNicholas Bellinger 1150a91eb7d9SNicholas Bellinger pr_err("iSCSI Login negotiation failed.\n"); 1151a91eb7d9SNicholas Bellinger iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1152a91eb7d9SNicholas Bellinger ISCSI_LOGIN_STATUS_INIT_ERR); 1153a91eb7d9SNicholas Bellinger if (!zero_tsih || !conn->sess) 1154a91eb7d9SNicholas Bellinger goto old_sess_out; 1155a91eb7d9SNicholas Bellinger if (conn->sess->se_sess) 1156a91eb7d9SNicholas Bellinger transport_free_session(conn->sess->se_sess); 1157a91eb7d9SNicholas Bellinger if (conn->sess->session_index != 0) { 1158a91eb7d9SNicholas Bellinger spin_lock_bh(&sess_idr_lock); 1159a91eb7d9SNicholas Bellinger idr_remove(&sess_idr, conn->sess->session_index); 1160a91eb7d9SNicholas Bellinger spin_unlock_bh(&sess_idr_lock); 1161a91eb7d9SNicholas Bellinger } 1162a91eb7d9SNicholas Bellinger kfree(conn->sess->sess_ops); 1163a91eb7d9SNicholas Bellinger kfree(conn->sess); 1164a91eb7d9SNicholas Bellinger 1165a91eb7d9SNicholas Bellinger old_sess_out: 1166a91eb7d9SNicholas Bellinger iscsi_stop_login_thread_timer(np); 1167a91eb7d9SNicholas Bellinger /* 1168a91eb7d9SNicholas Bellinger * If login negotiation fails check if the Time2Retain timer 1169a91eb7d9SNicholas Bellinger * needs to be restarted. 1170a91eb7d9SNicholas Bellinger */ 1171a91eb7d9SNicholas Bellinger if (!zero_tsih && conn->sess) { 1172a91eb7d9SNicholas Bellinger spin_lock_bh(&conn->sess->conn_lock); 1173a91eb7d9SNicholas Bellinger if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { 1174a91eb7d9SNicholas Bellinger struct se_portal_group *se_tpg = 117560bfcf8eSAndy Grover &conn->tpg->tpg_se_tpg; 1176a91eb7d9SNicholas Bellinger 1177a91eb7d9SNicholas Bellinger atomic_set(&conn->sess->session_continuation, 0); 1178a91eb7d9SNicholas Bellinger spin_unlock_bh(&conn->sess->conn_lock); 1179a91eb7d9SNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 1180a91eb7d9SNicholas Bellinger iscsit_start_time2retain_handler(conn->sess); 1181a91eb7d9SNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 1182a91eb7d9SNicholas Bellinger } else 1183a91eb7d9SNicholas Bellinger spin_unlock_bh(&conn->sess->conn_lock); 1184a91eb7d9SNicholas Bellinger iscsit_dec_session_usage_count(conn->sess); 1185a91eb7d9SNicholas Bellinger } 1186a91eb7d9SNicholas Bellinger 1187a91eb7d9SNicholas Bellinger if (!IS_ERR(conn->conn_rx_hash.tfm)) 1188a91eb7d9SNicholas Bellinger crypto_free_hash(conn->conn_rx_hash.tfm); 1189a91eb7d9SNicholas Bellinger if (!IS_ERR(conn->conn_tx_hash.tfm)) 1190a91eb7d9SNicholas Bellinger crypto_free_hash(conn->conn_tx_hash.tfm); 1191a91eb7d9SNicholas Bellinger 1192a91eb7d9SNicholas Bellinger free_cpumask_var(conn->conn_cpumask); 1193a91eb7d9SNicholas Bellinger 1194a91eb7d9SNicholas Bellinger kfree(conn->conn_ops); 1195a91eb7d9SNicholas Bellinger 1196a91eb7d9SNicholas Bellinger if (conn->param_list) { 1197a91eb7d9SNicholas Bellinger iscsi_release_param_list(conn->param_list); 1198a91eb7d9SNicholas Bellinger conn->param_list = NULL; 1199a91eb7d9SNicholas Bellinger } 1200a91eb7d9SNicholas Bellinger iscsi_target_nego_release(conn); 1201a91eb7d9SNicholas Bellinger 1202a91eb7d9SNicholas Bellinger if (conn->sock) { 1203a91eb7d9SNicholas Bellinger sock_release(conn->sock); 1204a91eb7d9SNicholas Bellinger conn->sock = NULL; 1205a91eb7d9SNicholas Bellinger } 1206a91eb7d9SNicholas Bellinger 1207954f2372SSagi Grimberg if (conn->conn_transport->iscsit_wait_conn) 1208954f2372SSagi Grimberg conn->conn_transport->iscsit_wait_conn(conn); 1209954f2372SSagi Grimberg 1210a91eb7d9SNicholas Bellinger if (conn->conn_transport->iscsit_free_conn) 1211a91eb7d9SNicholas Bellinger conn->conn_transport->iscsit_free_conn(conn); 1212a91eb7d9SNicholas Bellinger 1213a91eb7d9SNicholas Bellinger iscsit_put_transport(conn->conn_transport); 1214a91eb7d9SNicholas Bellinger kfree(conn); 1215a91eb7d9SNicholas Bellinger } 1216a91eb7d9SNicholas Bellinger 1217e48354ceSNicholas Bellinger static int __iscsi_target_login_thread(struct iscsi_np *np) 1218e48354ceSNicholas Bellinger { 1219baa4d64bSNicholas Bellinger u8 *buffer, zero_tsih = 0; 122081a9c5e7SMikulas Patocka int ret = 0, rc; 1221e48354ceSNicholas Bellinger struct iscsi_conn *conn = NULL; 1222e48354ceSNicholas Bellinger struct iscsi_login *login; 1223e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = NULL; 1224e48354ceSNicholas Bellinger struct iscsi_login_req *pdu; 1225a91eb7d9SNicholas Bellinger struct iscsi_tpg_np *tpg_np; 1226a91eb7d9SNicholas Bellinger bool new_sess = false; 1227e48354ceSNicholas Bellinger 1228e48354ceSNicholas Bellinger flush_signals(current); 1229e48354ceSNicholas Bellinger 1230e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1231e48354ceSNicholas Bellinger if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { 1232e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 1233e48354ceSNicholas Bellinger complete(&np->np_restart_comp); 123481a9c5e7SMikulas Patocka } else if (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN) { 123581a9c5e7SMikulas Patocka spin_unlock_bh(&np->np_thread_lock); 123681a9c5e7SMikulas Patocka goto exit; 1237e48354ceSNicholas Bellinger } else { 1238e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 1239e48354ceSNicholas Bellinger } 1240e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1241e48354ceSNicholas Bellinger 1242e48354ceSNicholas Bellinger conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); 1243e48354ceSNicholas Bellinger if (!conn) { 1244e48354ceSNicholas Bellinger pr_err("Could not allocate memory for" 1245e48354ceSNicholas Bellinger " new connection\n"); 1246e48354ceSNicholas Bellinger /* Get another socket */ 1247e48354ceSNicholas Bellinger return 1; 1248e48354ceSNicholas Bellinger } 1249e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); 1250e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_FREE; 1251e48354ceSNicholas Bellinger 1252baa4d64bSNicholas Bellinger if (iscsit_conn_set_transport(conn, np->np_transport) < 0) { 1253baa4d64bSNicholas Bellinger kfree(conn); 1254baa4d64bSNicholas Bellinger return 1; 1255baa4d64bSNicholas Bellinger } 1256e48354ceSNicholas Bellinger 1257baa4d64bSNicholas Bellinger rc = np->np_transport->iscsit_accept_np(np, conn); 1258baa4d64bSNicholas Bellinger if (rc == -ENOSYS) { 1259baa4d64bSNicholas Bellinger complete(&np->np_restart_comp); 1260baa4d64bSNicholas Bellinger iscsit_put_transport(conn->conn_transport); 1261baa4d64bSNicholas Bellinger kfree(conn); 1262baa4d64bSNicholas Bellinger conn = NULL; 1263baa4d64bSNicholas Bellinger goto exit; 1264baa4d64bSNicholas Bellinger } else if (rc < 0) { 1265baa4d64bSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1266baa4d64bSNicholas Bellinger if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { 1267baa4d64bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1268baa4d64bSNicholas Bellinger complete(&np->np_restart_comp); 1269baa4d64bSNicholas Bellinger iscsit_put_transport(conn->conn_transport); 1270baa4d64bSNicholas Bellinger kfree(conn); 1271baa4d64bSNicholas Bellinger conn = NULL; 1272baa4d64bSNicholas Bellinger /* Get another socket */ 1273baa4d64bSNicholas Bellinger return 1; 1274baa4d64bSNicholas Bellinger } 1275baa4d64bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1276baa4d64bSNicholas Bellinger iscsit_put_transport(conn->conn_transport); 1277baa4d64bSNicholas Bellinger kfree(conn); 1278baa4d64bSNicholas Bellinger conn = NULL; 1279baa4d64bSNicholas Bellinger goto out; 1280e48354ceSNicholas Bellinger } 1281e48354ceSNicholas Bellinger /* 1282e48354ceSNicholas Bellinger * Perform the remaining iSCSI connection initialization items.. 1283e48354ceSNicholas Bellinger */ 1284baa4d64bSNicholas Bellinger login = iscsi_login_init_conn(conn); 1285baa4d64bSNicholas Bellinger if (!login) { 1286e48354ceSNicholas Bellinger goto new_sess_out; 1287e48354ceSNicholas Bellinger } 1288e48354ceSNicholas Bellinger 1289baa4d64bSNicholas Bellinger iscsi_start_login_thread_timer(np); 1290e48354ceSNicholas Bellinger 1291baa4d64bSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); 1292baa4d64bSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_XPT_UP; 1293baa4d64bSNicholas Bellinger /* 1294baa4d64bSNicholas Bellinger * This will process the first login request + payload.. 1295baa4d64bSNicholas Bellinger */ 1296baa4d64bSNicholas Bellinger rc = np->np_transport->iscsit_get_login_rx(conn, login); 1297baa4d64bSNicholas Bellinger if (rc == 1) 1298baa4d64bSNicholas Bellinger return 1; 1299baa4d64bSNicholas Bellinger else if (rc < 0) 1300baa4d64bSNicholas Bellinger goto new_sess_out; 1301baa4d64bSNicholas Bellinger 1302baa4d64bSNicholas Bellinger buffer = &login->req[0]; 1303e48354ceSNicholas Bellinger pdu = (struct iscsi_login_req *)buffer; 1304e48354ceSNicholas Bellinger /* 1305e48354ceSNicholas Bellinger * Used by iscsit_tx_login_rsp() for Login Resonses PDUs 1306e48354ceSNicholas Bellinger * when Status-Class != 0. 1307e48354ceSNicholas Bellinger */ 1308e48354ceSNicholas Bellinger conn->login_itt = pdu->itt; 1309e48354ceSNicholas Bellinger 1310e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1311e48354ceSNicholas Bellinger if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { 1312e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1313e48354ceSNicholas Bellinger pr_err("iSCSI Network Portal on %s:%hu currently not" 1314e48354ceSNicholas Bellinger " active.\n", np->np_ip, np->np_port); 1315e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 1316e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); 1317e48354ceSNicholas Bellinger goto new_sess_out; 1318e48354ceSNicholas Bellinger } 1319e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1320e48354ceSNicholas Bellinger 1321e48354ceSNicholas Bellinger conn->network_transport = np->np_network_transport; 1322e48354ceSNicholas Bellinger 1323e48354ceSNicholas Bellinger pr_debug("Received iSCSI login request from %s on %s Network" 1324baa4d64bSNicholas Bellinger " Portal %s:%hu\n", conn->login_ip, np->np_transport->name, 13252f9bc894SNicholas Bellinger conn->local_ip, conn->local_port); 1326e48354ceSNicholas Bellinger 1327e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); 1328e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_IN_LOGIN; 1329e48354ceSNicholas Bellinger 1330e48354ceSNicholas Bellinger if (iscsi_login_check_initiator_version(conn, pdu->max_version, 1331e48354ceSNicholas Bellinger pdu->min_version) < 0) 1332e48354ceSNicholas Bellinger goto new_sess_out; 1333e48354ceSNicholas Bellinger 1334e48354ceSNicholas Bellinger zero_tsih = (pdu->tsih == 0x0000); 1335ee1b1b9cSAndy Grover if (zero_tsih) { 1336e48354ceSNicholas Bellinger /* 1337e48354ceSNicholas Bellinger * This is the leading connection of a new session. 1338e48354ceSNicholas Bellinger * We wait until after authentication to check for 1339e48354ceSNicholas Bellinger * session reinstatement. 1340e48354ceSNicholas Bellinger */ 1341e48354ceSNicholas Bellinger if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) 1342e48354ceSNicholas Bellinger goto new_sess_out; 1343e48354ceSNicholas Bellinger } else { 1344e48354ceSNicholas Bellinger /* 1345e48354ceSNicholas Bellinger * Add a new connection to an existing session. 1346e48354ceSNicholas Bellinger * We check for a non-existant session in 1347e48354ceSNicholas Bellinger * iscsi_login_non_zero_tsih_s2() below based 1348e48354ceSNicholas Bellinger * on ISID/TSIH, but wait until after authentication 1349e48354ceSNicholas Bellinger * to check for connection reinstatement, etc. 1350e48354ceSNicholas Bellinger */ 1351e48354ceSNicholas Bellinger if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) 1352e48354ceSNicholas Bellinger goto new_sess_out; 1353e48354ceSNicholas Bellinger } 1354e48354ceSNicholas Bellinger /* 1355baa4d64bSNicholas Bellinger * SessionType: Discovery 1356baa4d64bSNicholas Bellinger * 1357baa4d64bSNicholas Bellinger * Locates Default Portal 1358baa4d64bSNicholas Bellinger * 1359baa4d64bSNicholas Bellinger * SessionType: Normal 1360baa4d64bSNicholas Bellinger * 1361baa4d64bSNicholas Bellinger * Locates Target Portal from NP -> Target IQN 1362e48354ceSNicholas Bellinger */ 1363baa4d64bSNicholas Bellinger rc = iscsi_target_locate_portal(np, conn, login); 1364baa4d64bSNicholas Bellinger if (rc < 0) { 1365e48354ceSNicholas Bellinger tpg = conn->tpg; 1366e48354ceSNicholas Bellinger goto new_sess_out; 1367e48354ceSNicholas Bellinger } 1368a91eb7d9SNicholas Bellinger login->zero_tsih = zero_tsih; 1369e48354ceSNicholas Bellinger 1370e48354ceSNicholas Bellinger tpg = conn->tpg; 1371e48354ceSNicholas Bellinger if (!tpg) { 1372e48354ceSNicholas Bellinger pr_err("Unable to locate struct iscsi_conn->tpg\n"); 1373e48354ceSNicholas Bellinger goto new_sess_out; 1374e48354ceSNicholas Bellinger } 1375e48354ceSNicholas Bellinger 1376e48354ceSNicholas Bellinger if (zero_tsih) { 1377baa4d64bSNicholas Bellinger if (iscsi_login_zero_tsih_s2(conn) < 0) 1378e48354ceSNicholas Bellinger goto new_sess_out; 1379e48354ceSNicholas Bellinger } else { 1380baa4d64bSNicholas Bellinger if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) 1381e48354ceSNicholas Bellinger goto old_sess_out; 1382e48354ceSNicholas Bellinger } 1383e48354ceSNicholas Bellinger 1384a91eb7d9SNicholas Bellinger ret = iscsi_target_start_negotiation(login, conn); 1385a91eb7d9SNicholas Bellinger if (ret < 0) 1386e48354ceSNicholas Bellinger goto new_sess_out; 1387e48354ceSNicholas Bellinger 1388e48354ceSNicholas Bellinger if (!conn->sess) { 1389e48354ceSNicholas Bellinger pr_err("struct iscsi_conn session pointer is NULL!\n"); 1390e48354ceSNicholas Bellinger goto new_sess_out; 1391e48354ceSNicholas Bellinger } 1392e48354ceSNicholas Bellinger 1393e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1394e48354ceSNicholas Bellinger 1395e48354ceSNicholas Bellinger if (signal_pending(current)) 1396e48354ceSNicholas Bellinger goto new_sess_out; 1397e48354ceSNicholas Bellinger 1398a91eb7d9SNicholas Bellinger if (ret == 1) { 1399a91eb7d9SNicholas Bellinger tpg_np = conn->tpg_np; 1400e48354ceSNicholas Bellinger 1401a91eb7d9SNicholas Bellinger ret = iscsi_post_login_handler(np, conn, zero_tsih); 1402e48354ceSNicholas Bellinger if (ret < 0) 1403e48354ceSNicholas Bellinger goto new_sess_out; 1404e48354ceSNicholas Bellinger 1405a91eb7d9SNicholas Bellinger iscsit_deaccess_np(np, tpg, tpg_np); 1406a91eb7d9SNicholas Bellinger } 1407a91eb7d9SNicholas Bellinger 1408e48354ceSNicholas Bellinger tpg = NULL; 1409a91eb7d9SNicholas Bellinger tpg_np = NULL; 1410e48354ceSNicholas Bellinger /* Get another socket */ 1411e48354ceSNicholas Bellinger return 1; 1412e48354ceSNicholas Bellinger 1413e48354ceSNicholas Bellinger new_sess_out: 1414a91eb7d9SNicholas Bellinger new_sess = true; 1415e48354ceSNicholas Bellinger old_sess_out: 1416a91eb7d9SNicholas Bellinger tpg_np = conn->tpg_np; 1417a91eb7d9SNicholas Bellinger iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess); 1418a91eb7d9SNicholas Bellinger new_sess = false; 1419e48354ceSNicholas Bellinger 1420e48354ceSNicholas Bellinger if (tpg) { 1421a91eb7d9SNicholas Bellinger iscsit_deaccess_np(np, tpg, tpg_np); 1422e48354ceSNicholas Bellinger tpg = NULL; 1423a91eb7d9SNicholas Bellinger tpg_np = NULL; 1424e48354ceSNicholas Bellinger } 1425e48354ceSNicholas Bellinger 1426e48354ceSNicholas Bellinger out: 1427e48354ceSNicholas Bellinger return 1; 142881a9c5e7SMikulas Patocka 1429baa4d64bSNicholas Bellinger exit: 1430e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1431e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1432e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_EXIT; 1433e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1434baa4d64bSNicholas Bellinger 1435e48354ceSNicholas Bellinger return 0; 1436e48354ceSNicholas Bellinger } 1437e48354ceSNicholas Bellinger 1438e48354ceSNicholas Bellinger int iscsi_target_login_thread(void *arg) 1439e48354ceSNicholas Bellinger { 14408359cf43SJörn Engel struct iscsi_np *np = arg; 1441e48354ceSNicholas Bellinger int ret; 1442e48354ceSNicholas Bellinger 1443e48354ceSNicholas Bellinger allow_signal(SIGINT); 1444e48354ceSNicholas Bellinger 144581a9c5e7SMikulas Patocka while (1) { 1446e48354ceSNicholas Bellinger ret = __iscsi_target_login_thread(np); 1447e48354ceSNicholas Bellinger /* 1448e48354ceSNicholas Bellinger * We break and exit here unless another sock_accept() call 1449e48354ceSNicholas Bellinger * is expected. 1450e48354ceSNicholas Bellinger */ 1451e48354ceSNicholas Bellinger if (ret != 1) 1452e48354ceSNicholas Bellinger break; 1453e48354ceSNicholas Bellinger } 1454e48354ceSNicholas Bellinger 1455e48354ceSNicholas Bellinger return 0; 1456e48354ceSNicholas Bellinger } 1457